單項(xiàng)選擇題0n a vessel ,a C02 extinguisher is checked by（）.
A.reading the gage pressure
B.weighing the extinguisher
C.discharging a small amount of CO2
D.seeing if the seal has been broken
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1.單項(xiàng)選擇題0n a vessel,multipiying a load’s weight by the distance of the load’s center of gravity above the baseline results in a(n)（）.
A.transverse moment
B.vertical moment
C.righting moment
D.inclining moment
2.單項(xiàng)選擇題0n cargo booms,preventers are（）.
A.auxiliary guys
B.extra fair leads
C.steel bands
D.stops
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Shipboard Emergency Drills must be carried out at least（）on board cargo ship.
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（）is where the crew eat their meals.
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Bales close to the deckhead should be covered to prevent（）.
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